*{
    margin: 0;
    padding: 0;
}
.all{
    width: 302px;
    min-height: 700px;
    margin: 10px;
    border: 1px solid darkgrey;
}
.nav{
    width: 302px;
    height: 50px;
}
.xs{
    height: 50px;
    width: 150px;
    float: left;
    font-size: 18px;
    text-align: center;
    line-height: 50px;
    color: lightslategrey;
    background: rgb(245,245,245);
    cursor: pointer;
    border-left: 1px solid darkgrey;
    border-right: 1px solid darkgrey;
    border-bottom: 1px solid darkgrey;
}
.cx{
    height: 50px;
    width: 150px;
    float: left;
    font-size: 18px;
    text-align: center;
    line-height: 50px;
    color: lightslategrey;
    background: white;
    cursor: pointer;
}
.sj{
    width: 302px;
    min-height: 300px;
    margin-top: 21px;
    /* background: red; */
}
.lu{
    float: left;
}
li{
    list-style: none;
    min-height: 30px;
    margin-top: 10px;
    min-height: 30px;
    width: 100%;
}
i{
    float: left;
    font-style: normal;
    width: 24px;
    height: 30px;
    text-align: center;
    line-height: 30px;
}
span{
    float: right;
    width: 277px;
    min-height: 30px;
    line-height: 30px;
    border-bottom: 1px solid darkgrey;
    cursor: pointer;
}